JP4229853B2 - Application method and spectacle lens manufacturing method - Google Patents

Description

  The present invention relates to a coating method in which a coating solution is applied to a coated body, and a spectacle lens manufacturing method in which a light control function film is provided on a spectacle lens substrate.

Patent Document 1 describes a coating method in which a coating solution is coated on a coated body such as a spectacle lens. In this coating method, a coating liquid is dropped from above the coated body using a dropping device while the coated body is held and rotated by a holder, and the dropped coating liquid is spread by centrifugal force to be coated. It is applied uniformly on the surface of the application body.
Japanese Patent Laid-Open No. 2002-177852

  In order to position the dropping device for dropping the coating liquid directly above the object to be coated held by the holder, it is necessary to accurately recognize the position of the object to be coated. There is no description on how to recognize the position of the object to be coated held by the holder. When the type of the object to be coated is changed, it is necessary to recognize the position of the object to be coated held by the holder.

  However, after measuring the position of the object to be coated held by the holder using the measuring device, if the dropping device is moved to the desired position based on the measured value, the application to the object to be coated is completed. The coating work time becomes longer. Further, in the case of a coating liquid having a high viscosity like a coating liquid having a light control function and having to be applied thickly on the surface of an object to be coated such as an eyeglass lens, the coating method described in Patent Document 1, It may be difficult to apply the coating liquid evenly and without leaving a coating on the surface of the object to be coated. In recent years, in the field of spectacle lenses, a coating liquid having a light control function has been developed. In some cases, the liquid cannot be uniformly applied to the surface of the spectacle lens by simply dropping these liquids at predetermined positions on the spectacle lens and forming a film by the spin method.

  An object of the present invention has been made in consideration of the above-described circumstances, and is to provide a coating method capable of shortening the coating work time. Another object of the present invention is to leave the coating solution uniformly and uncoated on the convex surface as the coating surface of the coated body, depending on the shape of the coated body, particularly the spectacle lens, regardless of the type of coating liquid. An object of the present invention is to provide a method of manufacturing a spectacle lens that can be applied without any problem.

  The invention according to claim 1 is a coating method in which a coating liquid is dropped and applied from the nozzle of a dropping device to the coating surface while rotating a coated object having a convex curved surface. The position of the nozzle of the dropping device is determined based on the shape data of the coated body, and the movement trajectory of the nozzle is determined.

  According to a second aspect of the present invention, in the first aspect of the invention, the rotational state of the coated body when the coating liquid is dropped from the nozzle of the dropping device is determined according to the shape data of the coated body. It is characterized by doing.

  According to a third aspect of the present invention, in the second aspect of the present invention, the shape data of the object to be coated is an external dimension of the object to be coated.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the rotational state of the coated body after the coating liquid is dropped from the nozzle of the dropping device is the shape of the coated body. It is determined according to the data and the viscosity of the coating liquid.

  The invention according to claim 5 is the invention according to claim 4, wherein the shape data of the object to be coated is convex curve data of the object to be coated.

  The invention according to claim 6, after rotating the spectacle lens substrate with the convex surface up, dropping the coating liquid from the nozzle of the dropping device onto the convex surface of the spectacle lens substrate to form a coating layer, A method for manufacturing a spectacle lens in which a coating layer is formed on a convex surface of a spectacle lens substrate by curing, and the position of the nozzle of the dropping device is determined based on the shape data of the spectacle lens substrate, and the nozzle The movement trajectory is determined.

  The invention according to claim 7 is the invention according to claim 6, wherein the coating liquid is a coating liquid having a light control function.

  According to the first, sixth, or seventh aspect of the invention, the position of the nozzle of the dropping device is determined and the movement trajectory of the nozzle is determined based on the shape data of the object to be coated (such as a spectacle lens base material). Therefore, since these nozzle positions and nozzle movement trajectories can be determined in a shorter time than when actually measuring the position of the object to be coated and determining based on this measurement data, the coating work time can be reduced as a whole. .

  According to the invention described in claim 2, 3, 6 or 7, an object to be coated (such as a spectacle lens substrate) when a coating liquid (such as a coating liquid having a light control function) is dropped from the nozzle of the dropping device. Since the rotation state is determined according to the shape data (particularly the outer diameter) of the object to be coated, the coating liquid is evenly applied to the coating surface (convex surface) of the object to be coated with the minimum necessary liquid amount. Can be applied.

  According to the invention of any one of claims 4 to 7, the rotation of the object to be coated (such as a spectacle lens substrate) after dripping the coating liquid (such as a coating liquid having a light control function) from the nozzle of the dropping device Since the state is determined according to the shape data (particularly the convex curve of the coating surface) of the coated surface (convex surface) of the object to be coated and the viscosity of the coating liquid, for example, the convex curve data and coating liquid of these coated surfaces When the dropped coating liquid easily flows on the coating surface of the coated body due to the viscosity of the coating film, the coating film can be adjusted to a predetermined thickness by shortening the rotation time of the coated body.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram schematically showing a coating apparatus for carrying out an embodiment of a coating method according to the present invention.

  The coating apparatus 10 shown in FIG. 1 applies a coating liquid onto a spin holder 11 that holds and holds a spectacle lens substrate 1 as a spectacle lens substrate and a coating surface 2 as a convex surface of the spectacle lens substrate 1. The dispenser 12 as a dripping device for dripping the coating liquid 9 (FIG. 3) and a control device 13 having a control personal computer are configured. A data management server 14 storing shape data is connected via a communication cable 24.

  As shown in FIG. 2, the spectacle lens substrate 1 is formed such that the surface to be the application surface 2 has a curved surface shape (convex surface shape) convex upward, and the back surface 3 has a concave shape. The O-ring 15 (FIG. 2) of the spin holder 11 (FIG. 1) is in contact with the back surface 3, and the spin holder 11 uses the O-ring 15 to adsorb and hold the spectacle lens substrate 1 with a negative pressure. Two spin holders 11 are installed corresponding to the spectacle lens substrate 1, and each is rotated by a spin motor 16.

  As shown in FIG. 1, two dispensers 12 are also installed corresponding to the spectacle lens substrate 1. Each dispenser 12 is provided so as to be movable up and down with respect to the spectacle lens substrate 1 held by the spin holder 11 by the rotation of the dispenser motor 17. Further, these two dispensers 12 are provided so as to be horizontally movable simultaneously in the diameter direction of the spectacle lens substrate 1 held by the spin holder 11 by driving the slide motor 18. These two dispensers 12 are attached to a lifting mechanism (not shown) and configured to be movable up and down as a whole with respect to the spectacle lens substrate 1 held by the spin holder 11.

  An edge spatula 21 is fixedly attached to each dispenser 12 in the vicinity of each nozzle 20. Further, an edge sponge 22 can be moved forward and backward with respect to the end surface 4 (edge) of the spectacle lens substrate 1 held by the spin holder 11 using an edge sponge cylinder (not shown) in the vicinity of each spin holder 11. is set up.

  The edge spatula 21 and the edge sponge 22 function in a step of smoothing the coating liquid 9 on the application surface 2 after the coating liquid 9 is dropped from the dispenser 12 onto the application surface 2 of the spectacle lens substrate 1. Is. That is, the edge spatula 21 is pressed from the upper side to the lower side by the action of the dispenser motor 17 while smoothing the coating liquid 9, so that the surplus is applied. The coating liquid 9 is scraped off. Similarly, the edge sponge 22 is pressed against the end surface 4 of the spectacle lens substrate 1 while smoothing the coating solution 9 to apply the coating solution 9 to the end surface 4, and the excess coating solution 9. Suck away and remove.

  The control device 13 is connected to a spin motor 16, a dispenser motor 17, a slide motor 18, an edge sponge cylinder (not shown), etc. via a communication cable 24, and controls the operation of these motors and cylinders. Further, the control device 13 controls the amount of the coating liquid 9 dropped from the dispenser 12 according to the viscosity of the coating liquid 9.

  Here, the coating liquid 9 is a liquid having a light control function (photochromic function) that changes color when irradiated with light including ultraviolet rays. The coating liquid 9 includes, for example, a photochromic compound, a radical polymerizable monomer, and an amine compound, and the radical polymerizable monomer has a silanol group or a radical polymerizable group that generates a silanol group by hydrolysis. It contains a monomer.

  More specifically, the coating solution 9 comprises 5 parts by weight of γ-methacryloyloxypropyltrimethoxysilane, 20 parts by weight of trimethylolpropane trimethacrylate, 2,2-bis (4-methacryloyloxypolyethoxyphenyl) propane 35. 1 part by weight, 10 parts by weight of polyester oligomer hexaacrylate, 20 parts by weight of polyethylene glycol diacrylate having an average molecule of 532, 100 parts by weight of polymerizable monomer consisting of 10 parts by weight of glycidyl methacrylate, 3 parts by weight of chromene 1, and N-methyldiethanolamine 5 parts by weight, LS765 [Bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate and a mixture of methyl (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate; 5 parts by weight of CGI184 [1-hydroxycyclohexylphenol] as a polymerization initiator A composition comprising 0.4 part by weight of luketone; the same applies hereinafter and 0.1 part by weight of CGI403 [bis (2,6-dimethoxybenzoyl-2,4,4-trimethylpentylphosphine oxide; the same applies hereinafter). Is.

  Alternatively, this coating solution 9 is composed of 5 parts by weight of γ-methacryloyloxypropyltrimethoxysilane, 20 parts by weight of trimethylolpropane trimethacrylate, 35 parts by weight of 2,2-bis (4-methacryloyloxypolyethoxyphenyl) propane, and a polyester oligomer. 15 parts by weight of hexaacrylate, 15 parts by weight of polyethylene glycol diacrylate having an average molecule of 532, 100 parts by weight of polymerizable monomer comprising 10 parts of glycidyl methacrylate, 3 parts by weight of chromene 1, 5 parts by weight of N-methyldiethanolamine, LS765 And 5 parts by weight of CGI184 as a polymerization initiator and 0.1 part by weight of CGI403 as a polymerization initiator.

  Alternatively, this coating solution 9 is composed of 5 parts by weight of γ-methacryloyloxypropyltrimethoxysilane, 20 parts by weight of trimethylolpropane trimethacrylate, 35 parts by weight of 2,2-bis (4-methacryloyloxypolyethoxyphenyl) propane, and a polyester oligomer. 100 parts by weight of a polymerizable monomer comprising 20 parts by weight of hexaacrylate, 10 parts of polyethylene glycol diacrylate having an average molecule of 532, and 10 parts of glycidyl methacrylate, 3 parts by weight of chromene 1, 5 parts by weight of N-methyldiethanolamine, LS765 And 5 parts by weight of CGI184 as a polymerization initiator and 0.1 part by weight of CGI403 as a polymerization initiator.

  The coating liquid 9 as described above has a higher viscosity than a general coating liquid and is 25 to 500 cps at 25 ° C. And this highly viscous coating liquid 9 is coated on the convex-shaped application surface 2 (see FIG. 2) of the spectacle lens substrate 1 with a film thickness of several tens of μm (for example, 30 μm) using the application device 10. A light control film (not shown) is formed. The reason why the light control film is formed by coating the coating liquid 9 in this way is to maintain the light control function for a long period of time in the spectacle lens substrate 1 (that is, the light control lens) having the light control film. The film thickness of the light control film having the light control function is preferably in the range of 10 to 100 μm, more preferably 20 to 50 μm.

  Moreover, the coating liquid 9 that exhibits the light control function by the action of ultraviolet rays is applied to the convex application surface 2 of the spectacle lens substrate 1 and not applied to the back surface 3 for the following reason. That is, light enters from the front surface which is the application surface 2 of the spectacle lens substrate 1 and exits from the back surface 3. Since many eyeglass lens substrates 1 in recent years contain an ultraviolet absorber, the light reaching the back surface 3 contains almost no ultraviolet rays. Therefore, even if the coating liquid 9 having a light control function is applied to the back surface 3, the light control film made of the coating liquid 9 does not exhibit the light control function. Therefore, in order to make the light control film exhibit a sufficient light control function, the coating liquid 9 having the light control function is applied to the convex application surface 2 of the spectacle lens substrate 1.

  The data management server 14 stores the shape data of the spectacle lens base 1 for each spectacle lens base 1. The shape data includes the lens outer diameter D1 of the spectacle lens substrate 1, the convex curve BC on the application surface 2 of the spectacle lens substrate 1, the concave curve B2 on the back surface 3 of the spectacle lens substrate 1, and the spectacle lens substrate 1. The center thickness CT, the refractive index n of the spectacle lens substrate 1, and the like.

  In order to apply a light control film as a coating film to the convex-shaped application surface 2 of the spectacle lens substrate 1 using the above-described application device 10, the spectacle lens base is applied to the spin holder 11 under the control of the control device 13. While rotating the spin holder 11 while holding the material 1, a coating liquid 9 having a light control function is dropped from the nozzle 20 of the dispenser 12 positioned above the spectacle lens substrate 1, and the dispenser 12 is in the meantime. The nozzle 20 is temporarily stopped in the vicinity of the outer periphery of the spectacle lens substrate 1 without being brought into contact with the spectacle lens substrate 1 held by the spin holder 11, and then the geometry of the spectacle lens substrate 1 from the vicinity of the outer periphery. The eyeglass lens substrate 1 is linearly moved in a non-contact state toward the academic center or the optical center direction. Due to the rotation of the spectacle lens substrate 1 by the spin holder 11 and the movement of the nozzle 20, the coating liquid 9 is dropped from the nozzle 20 of the dispenser 12 as shown in FIG. After the coating liquid 9 is dropped in a ring shape near the outer periphery of the lens, the coating liquid 9 is dropped spirally from the vicinity of the outer periphery toward the geometric center or optical center direction of the spectacle lens substrate 1. Reference numeral 25 in FIG. 3 indicates a ring-like dropping portion of the coating liquid 9, and reference numeral 26 indicates a spiral dropping portion of the coating liquid 9.

  Here, the vicinity of the outer periphery of the spectacle lens substrate 1 refers to a region having a dimension β (for example, 10 mm) inward from the outer periphery (that is, the end surface 4) of the spectacle lens substrate 1. The coating liquid 9 is dropped, for example, once in a ring shape at a position where the dimension β (for example, 10 mm) is reached inward from the outer periphery (end surface 4) of the spectacle lens substrate 1 in the region.

  The initial position of the nozzle 20 of the dispenser 12 above the spectacle lens substrate 1 held by the spin holder 11 and the nozzle of the dispenser 12 when the coating liquid 9 is dropped onto the application surface 2 of the spectacle lens substrate 1 in a ring shape. The 20 positions and the movement trajectory of the nozzle 20 in the dispenser 12 when the coating liquid 9 is dropped on the application surface 2 of the spectacle lens substrate 1 in a spiral shape are the positions of the spectacle lens substrate 1 stored in the data management server 14. The control device 13 determines based on the shape data.

次に、データ管理サーバ１４に格納された眼鏡レンズ基材１の中心肉厚ＣＴ（即ち眼鏡レンズ基材１の裏面３における頂点Ｐと塗布面２の頂点Ｏとの距離）と上記距離Ｌとから、眼鏡レンズ基材１の塗布面２における上記頂点Ｏ位置を算出する。 That is, as shown in FIG. 2, first, from the refractive index n of the spectacle lens substrate 1 stored in the data management server 14 and the concave curve B2 of the back surface 3 of the spectacle lens substrate 1, the following equation is used. A radius of curvature R on the back surface 3 of the spectacle lens substrate 1 is calculated.
R = 1000 × (n−1) / B2
Next, the distance L from the vertex of the O-ring 15 in the spin holder 11 to the vertex P of the back surface 3 in the spectacle lens substrate 1 is calculated from the following equation using the radius of curvature R.

Next, the central thickness CT of the spectacle lens substrate 1 stored in the data management server 14 (that is, the distance between the apex P on the back surface 3 of the spectacle lens substrate 1 and the apex O of the coating surface 2) and the distance L described above. From the above, the vertex O position on the application surface 2 of the spectacle lens substrate 1 is calculated.

  The initial position of the nozzle 20 of the dispenser 12 with respect to the spectacle lens substrate 1 is such that the tip of the nozzle 20 is directly above the vertex O on the application surface 2 of the spectacle lens substrate 1 and a predetermined distance α (for example, 5). -10 mm) is set to be an upper position.

  Further, the position of the nozzle 20 of the dispenser 12 when the coating liquid 9 is dropped in a ring shape on the application surface 2 of the spectacle lens substrate 1 is the lens outer diameter D1 of the spectacle lens substrate 1 stored in the data management server 14 and It is determined using the convex curve BC of the application surface 2 of the spectacle lens substrate 1. That is, first, with respect to the horizontal line A passing through the tip of the initial position of the nozzle 20, an operation line B inclined by a predetermined angle θ from the tip of the initial position of the nozzle 20 toward the application surface 2 of the spectacle lens substrate 1 is set. Next, the convex surface of the application surface 2 of the spectacle lens base 1 is prevented so that the nozzle 20 does not contact the application surface 2 of the spectacle lens base 1 when the tip of the nozzle 20 moves along the operation straight line B. The predetermined angle θ is set in consideration of the curve BC. Then, the coating liquid 9 is formed in a ring shape so that the intersection point Q between the vertical line C drawn inward from the outer periphery of the spectacle lens substrate 1 to the position of the dimension β and the operation straight line B is the tip position of the nozzle 20. The position of the nozzle 20 of the dispenser 12 when dropping is determined.

  Further, the movement trajectory of the nozzle 20 in the dispenser 12 when the coating liquid 9 is dropped in a spiral shape on the application surface 2 of the spectacle lens substrate 1 is the position of the nozzle 20 when the coating liquid 9 is dropped in a ring shape as described above. It is the operation straight line B set when determining. When the coating liquid 9 is spirally dropped from the nozzle 20 of the dispenser 12 onto the application surface 2 of the spectacle lens substrate 1, the tip of the nozzle 20 follows the operation straight line B to the outer periphery of the spectacle lens substrate 1. A straight line moves from the intersection point Q toward the center of the spectacle lens substrate 1.

  By the way, when the coating liquid 9 is dropped from the nozzle 20 of the dispenser 12, the rotational state of the spectacle lens substrate 1 held by the spin holder 11 and the movement state along the movement locus (operation line B) of the dispenser 12 are as follows. The controller 13 determines the shape data of the spectacle lens substrate 1, particularly the lens outer diameter D 1 of the spectacle lens substrate 1.

  In the present embodiment, when the coating liquid 9 is dropped in a ring shape from the nozzle 20 of the dispenser 12 onto the application surface 2 of the spectacle lens base material 1, the rotational speed of the spectacle lens base material 1 is constant (for example, 15 rpm), the rotation time of the spectacle lens substrate 1 is set to 3 to 4 seconds, for example, according to the lens outer diameter D1 of the spectacle lens substrate 1. As an example, when the lens outer diameter D1 of the spectacle lens substrate 1 is large, the rotation time of the spectacle lens substrate 1 held by the spin holder 11 is set to be long.

  In addition, when the coating liquid 9 is dropped in a spiral manner from the nozzle 20 of the dispenser 12 onto the application surface 2 of the spectacle lens base material 1, the spectacle lens base material 1 is rotated at a constant rotational speed (for example, 60 rpm). The rotation time of the lens substrate 1 is set to, for example, 7 to 12 seconds according to the lens outer diameter D1 of the spectacle lens substrate 1, and the movement speed of the dispenser 12 is constant and the movement time of the dispenser 12 is It is set according to the lens outer diameter D1 of the spectacle lens substrate 1. As an example, when the lens outer diameter D1 of the spectacle lens substrate 1 is large, the rotation time of the spectacle lens substrate 1 held by the spin holder 11 is long, and the movement time of the dispenser 12 is set long.

  As described above, it is not determined by changing the rotation time of the spectacle lens base material 1 or the movement time of the dispenser 12 according to the lens outer diameter D1 of the spectacle lens base material 1, but the lens outer surface of the spectacle lens base material 1 Depending on the diameter D1, the rotational speed of the spectacle lens base material 1 and the moving speed of the dispenser 12 may be changed, or the spectacle lens base material may be determined according to the lens outer diameter D1 of the spectacle lens base material 1. The number of rotations and the rotation time of 1 may be changed together, and the moving speed and the moving time of the dispenser 12 may be changed and determined respectively.

  When the coating liquid 9 is dropped from the nozzle 20 of the dispenser 12, even if the viscosity of the coating liquid 9 changes due to the temperature change of the coating liquid 9, the dropping flow rate of the coating liquid 9 dropped from the nozzle 20 is constant. Thus, the internal pressure of the dispenser 12 is adjusted. For example, when the temperature of the coating liquid 9 increases and the viscosity of the coating liquid 9 decreases, the internal pressure of the dispenser 12 is decreased and the dropping flow rate of the coating liquid 9 from the nozzle 20 is adjusted to be constant. .

  In addition, after the coating liquid 9 is dropped from the nozzle 20 of the dispenser 12, a plurality of rotation speeds are set differently in order to smooth the coating liquid 9 on the application surface 2 of the spectacle lens substrate 1. The eyeglass lens substrate 1 is rotated by the spin holder 11 at each rotation speed of the smoothing step. In each of these smoothing steps, the rotation state of the spectacle lens substrate 1 held by the spin holder 11 is controlled by the control device 13 in accordance with the shape data of the spectacle lens substrate 1 (particularly on the application surface 2 of the spectacle lens substrate 1). It is determined according to the convex curve BC) and the viscosity of the coating liquid 9.

  In the present embodiment, the number of rotations of the spectacle lens base material 1 in each smoothing step is not changed, and the convex curve BC of the application surface 2 of the spectacle lens base material 1 and the coating liquid 9 due to the temperature change of the coating liquid 9 are performed. Depending on the viscosity, the rotation time of the spectacle lens substrate 1 in each smoothing step is changed in consideration of whether or not the coating liquid 9 dropped on the application surface 2 of the spectacle lens substrate 1 flows easily. The light control film on the coating surface 2 of the lens substrate 1 is adjusted to a predetermined film thickness. For example, when the convex curve BC of the spectacle lens substrate 1 is deep and the temperature of the coating solution 9 is high and the viscosity of the coating solution 9 is reduced, the coating solution 9 is applied on the application surface 2 of the spectacle lens substrate 1. Since it becomes easy to flow, the rotation time of the spectacle lens base material 1 in each smoothing step is shortened, and the light control film coated on the application surface 2 of the spectacle lens base material 1 is adjusted to a predetermined film thickness.

  As described above, according to the convex curve BC on the application surface 2 of the spectacle lens substrate 1 and the viscosity of the coating liquid 9, instead of changing and determining the rotation time of the spectacle lens substrate 1 in each smoothing step, Depending on the convex curve BC on the application surface 2 of the spectacle lens substrate 1 and the viscosity of the coating liquid 9, the number of rotations of the spectacle lens substrate 1 in each smoothing step may be changed or determined. Depending on the convex curve BC on the coating surface 2 of the material 1 and the viscosity of the coating liquid 9, both the rotation speed and the rotation time of the spectacle lens substrate 1 in each smoothing step may be changed and determined.

Next, the coating (application) operation of the coating liquid 9 onto the spectacle lens substrate 1 by the control device 13 of the application apparatus 10 will be described with reference to the flowchart of FIG.
First, the spectacle lens substrate 1 transferred to the spin holder 11 by a moving device (not shown) is fixed and held on the spin holder 11 by the action of negative pressure (step S1).

  Next, the vertex O position on the application surface 2 of the spectacle lens substrate 1 held by the spin holder 11 is determined based on the shape data (lens outer diameter D1) of the spectacle lens substrate 1 stored in the data management server 14. Based on these calculated values, the dispenser motor 17 and the slide motor 18 are driven to move the dispenser 12, and the nozzle 20 of the dispenser 12 is moved to the vicinity of the outer periphery of the spectacle lens substrate 1, that is, the outer periphery of the spectacle lens substrate 1. Is positioned at the position where the dimension β reaches from the inside to the inside (step S2).

  In this state, the spin motor 16 is driven to rotate the spin holder 11 at a predetermined number of rotations (for example, 15 rpm), the spectacle lens substrate 1 held by the spin holder 11 is rotated, and the dispenser 12 is operated. The coating liquid 9 is dropped from the 12 nozzles 20 in a ring shape at a position near the outer periphery of the application surface 2 of the spectacle lens substrate 1 and reaching the dimension β inward from the outer periphery of the spectacle lens substrate 1. (Step S3).

  Next, the spin motor 16 is driven to rotate the spin holder 11 at a predetermined number of rotations (for example, 60 rpm), and the dispenser motor 17 and the slide motor 18 are driven so that the tip of the nozzle 20 of the dispenser 12 becomes the operation straight line B. The nozzle 20 is moved toward the center (vertex O) of the spectacle lens substrate 1 so as to follow, and the coating liquid 9 is dropped from the nozzle 20 onto the application surface 2 of the spectacle lens substrate 1 in a spiral manner (step S4). ). In these steps S3 and S4, the rotation time of the spectacle lens substrate 1 by the spin holder 11 is determined based on the lens outer diameter D1 of the spectacle lens substrate 1.

  Thereafter, the dropping of the coating liquid 9 from the nozzle 20 of the dispenser 12 is stopped, the rotation of the spectacle lens base 1 is continued or waited for a predetermined time in a stopped state, and the dropped coating liquid 9 is supplied to the spectacle lens base. It spreads over the coating surface 2 of the material 1 and waits for stable coating on the coating surface 2 (step S5).

  Next, the dispenser motor 17 is driven, the edge spatula 21 is pressed against the coating liquid 9 on the coating surface 2 near the outer periphery of the spectacle lens substrate 1, and an edge sponge cylinder (not shown) is further driven to The sponge 22 is pressed against the end surface 4 of the spectacle lens substrate 1 (step S6).

  Thereafter, the spin motor 16 is driven to execute a plurality of, for example, six smoothing steps, and the light control film coated on the application surface 2 of the spectacle lens substrate 1 is uniformly smoothed (step S7). In step S7, the rotation time of the spectacle lens substrate 1 in each smoothing step is determined based on the convex curve BC on the application surface 2 of the spectacle lens substrate 1 and the viscosity of the coating liquid 9.

  These smoothing steps are performed in the order from a smoothing step in which the rotation speed of the spectacle lens substrate 1 is low to a smoothing step in which the rotation speed of the spectacle lens base material 1 is the highest. After the execution, a plurality of smoothing steps in which the number of rotations of the spectacle lens substrate 1 is sequentially reduced are performed in that order. For example, if the maximum rotation speed of the spectacle lens substrate 1 is 600 rpm, the smoothing steps of the rotation speed of the spectacle lens substrate 1 are 50 rpm, 150 rpm, 200 rpm, 600 rpm, 200 rpm, and 150 rpm, respectively, are performed in this order.

  While performing each smoothing step of step S7, the edge spatula 21 scrapes off the excess coating liquid 9 on the application surface 2 of the spectacle lens substrate 1, and the edge sponge 22 The coating liquid 9 is coated on the end face 4 and the excess coating liquid 9 is sucked out and removed.

  After executing each smoothing step, the dispenser motor 17 and the edge sponge cylinder (not shown) are driven to separate the edge spatula 21 and the edge sponge 22 from the spectacle lens substrate 1 (step S8). The driving is stopped and the rotation of the spectacle lens substrate 1 is stopped.

  Finally, the negative pressure of the spin holder 11 is released, and the fixation of the spectacle lens substrate 1 by the spin holder 11 is released (step S9). The spectacle lens substrate 1 is transferred to a drying process by a transfer device. In the drying step, the light control film coated on the application surface 2 of the spectacle lens substrate 1 is cured and dried by irradiation with ultraviolet rays in a nitrogen gas atmosphere.

With the configuration as described above, the following effects (1) to (5) are achieved according to the above embodiment.
(1) Since the coating liquid 9 having a light control function is dropped and applied in a ring shape in the vicinity of the outer periphery of the application surface 2 of the spectacle lens substrate 1 (position where the dimension β reaches from the outer periphery to the inner side), In the vicinity of the outer periphery, the coating liquid 9 can be applied uniformly and without any unpainted portions. In addition, the coating surface 9 of the spectacle lens substrate 1 is applied by dropping the coating liquid 9 having a dimming function spirally from the vicinity of the outer periphery to the center of the application surface 2 of the spectacle lens substrate 1. Even if there is a difference in the convex curve BC or a difference in spherical or aspherical surface, the coating liquid 9 can be uniformly applied to the application surface 2 of the spectacle lens substrate 1. As a result, even if the coating liquid 9 having a high viscosity (25 to 500 cps at 25 ° C.) is provided near and inside the outer periphery of the application surface 2 of the spectacle lens substrate 1, the film thickness is several tens of μm (for example, 30 μm). The light control film can be applied uniformly and without any unpainted areas. Thus, regardless of the type of coating liquid 9 (particularly, the difference in viscosity), the coating liquid 9 is uniformly applied to the convex application surface 2 of the spectacle lens substrate 1 according to the shape of the spectacle lens substrate 1. And can be applied without any unpainted areas.

  (2) The coating liquid 9 having a light control function is spirally formed from the vicinity of the outer periphery of the application surface 2 of the light control lens 1 (position where the dimension β reaches from the outer periphery to the inside) toward the center of the spectacle lens substrate 1. Since the coating liquid 9 is newly dripped onto the coating liquid 9 that has already been dripped and is flowing due to centrifugal force, the newly dripped coating liquid is discharged wastefully. The coating liquid 9 that is dripped is always applied to a portion of the application surface 2 of the spectacle lens substrate 1 where the coating liquid is not yet present. It can be an amount.

  (3) Since the position of the nozzle 20 of the dispenser 12 is determined based on the shape data of the spectacle lens substrate 1, and the movement trajectory of the nozzle 20 is determined, the nozzle 20 position and the nozzle 20 movement trajectory are Compared with the case where the position of the spectacle lens substrate 1 is actually measured and determined based on this measurement data, it can be determined in a shorter time, so that the application time can be reduced as a whole.

  (4) Rotation of the spectacle lens substrate 1 when the coating liquid 9 (the coating liquid 9 having a dimming function) is dropped in a ring shape or a spiral shape from the nozzle 20 of the dispenser 12 onto the application surface 2 of the spectacle lens substrate 1 Since the state (rotation time, number of rotations) is determined according to the shape data of the spectacle lens substrate 1, particularly the outer diameter D1, the coating liquid 9 is applied to the application surface 2 of the spectacle lens substrate 1 to the minimum necessary. It can be applied evenly with no liquid remaining.

  (5) The rotation state (rotation time, rotation speed) of the spectacle lens substrate 1 at each smoothing step after the coating liquid 9 (coating liquid 9 having a light control function) is dropped from the nozzle 20 of the dispenser 12 Since it is determined according to the shape data of the application surface 2 of the spectacle lens substrate 1, in particular, the convex curve BC and the viscosity of the coating liquid 9, it is dropped by the convex curve BC of the application surface 2 and the viscosity of the coating liquid 9. When the coating liquid 9 easily flows on the application surface 2 of the spectacle lens substrate 1, the coating film on the application surface 2 of the spectacle lens substrate 1 is shortened, for example, by shortening the rotation time of the spectacle lens substrate 1. (Light control film) can be adjusted to a predetermined film thickness.

As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.
For example, in the above embodiment, the case where the object to be coated is the spectacle lens base material 1 is described, but the coating liquid having or not having the light control function on the lens base material of the lens in an optical apparatus such as a camera or a microscope. You may implement this invention, when apply | coating. Further, the object to be coated is a silicon wafer, a printed wiring board, a planar type semiconductor element, a shadow mask, an antireflection plate for television, etc., and the present invention can be applied when applying a coating film to these objects to be coated. Good.

It is a block diagram which shows schematically the coating device which implements one Embodiment of the coating method which concerns on this invention. It is a side view which shows roughly the positional relationship of the dispenser of FIG. 1, and a spectacles lens base material. It is a top view which shows the dripping state of the coating liquid in the lens application surface by the dispenser of FIG. It is a flowchart which shows the procedure which apply | coats a coating liquid to a lens application surface with the coating device of FIG.

Explanation of symbols

1 Eyeglass lens substrate (Subject to be coated)
2 Application surface (convex surface)
3 Back 4 End face (outer)
9 Coating liquid (application liquid)
DESCRIPTION OF SYMBOLS 10 Application | coating apparatus 11 Spin holder 12 Dispenser (drip apparatus)
DESCRIPTION OF SYMBOLS 13 Control apparatus 14 Data management server 16 Spin motor 17 Dispenser motor 18 Slide motor 20 Nozzle 25 Ring drop part 26 Spiral drop part D1 Lens outer diameter of spectacle lens base material BC Convex curve in spectacle lens application surface B2 Eyeglass lens Concave curve on the back side of the CT CT Center thickness of the spectacle lens n Refractive index of the spectacle lens

Claims (7)

A coating method in which a coating liquid is dropped onto a coating surface from a nozzle of a dropping device while rotating a coated body having a curved surface shape with a convex convex surface,
Using the shape data of the coated body, calculate each position including the vertex position of the coated body from the data value including the curved surface curve and the external dimensions of the coated body included in the data,
While determining the position of the nozzle of the dropping device based on the calculated position of the object to be applied, and determining the movement trajectory of the nozzle ,
In a state where the nozzle is not brought into contact with the coated body, the coating liquid is dropped in a state where the nozzle is temporarily stopped at a position near the outer periphery of the coated body and a certain distance from the outer periphery toward the center. Next, after applying the coating liquid in a ring shape in the vicinity of the outer periphery of the coated body by moving the nozzle toward the center of the coated body while dropping the coating liquid, A coating method, wherein the coating liquid is spirally coated from the vicinity of the outer periphery toward the central direction .   The coating method according to claim 1, wherein a rotation state of the coated body when the coating liquid is dropped from a nozzle of the dropping device is determined according to shape data of the coated body. The rotational state of the medium to be coated in after dropping a coating solution from a nozzle of the dropping device, according to claim 1 or 2, characterized in that determined in accordance with the viscosity of the shape data and the coating liquid of the member to be coated Application method. 4. The coating method according to claim 3 , wherein the shape data of the coated body is convex curve data of the coated body. The coating method according to claim 1, wherein the coating solution has a viscosity of 25 cps or more and 500 cps or less. While holding and rotating the spectacle lens substrate with the convex surface on the spin holder, a coating solution having a viscosity of 25 cps to 500 cps is dropped onto the convex surface of the spectacle lens substrate from the nozzle of the dropping device to form a coating layer. Then, it is cured to form a coating film having a thickness of 10 μm to 100 μm on the convex surface of the spectacle lens substrate.
When forming the coating layer, the shape data of the spectacle lens base material is used to store the data.
Calculate the position of the apex of the spectacle lens substrate from the values of the refractive index, curved surface curve, radius of curvature and central wall thickness of the included spectacle lens substrate,
A position that is a predetermined distance away from the vertex just above the calculated vertex position of the spectacle lens substrate is determined as the initial position of the nozzle tip of the dropping device,
An operation line inclined at a predetermined angle with respect to a horizontal line passing through the initial position, and a convex curve is formed so that the nozzle does not contact the convex surface of the spectacle lens substrate when the nozzle tip moves along the operation line. The position where the operation straight line in which the tilt angle is set in consideration and the vertical line near the outer periphery of the spectacle lens substrate and drawn from the outer periphery to the position of the predetermined dimension intersects is below the coating droplet. Set the drop start position of the nozzle tip when starting
While maintaining the state where the nozzle is temporarily stopped at the dropping start position, the nozzle is then moved toward the center of the eyeglass lens substrate along the operation straight line while dropping the coating liquid. Thus, the application liquid is applied in a ring shape in the vicinity of the outer periphery of the spectacle lens substrate, and then the application liquid is applied spirally from the vicinity of the outer periphery toward the central direction. Lens manufacturing method.   The method for manufacturing a spectacle lens according to claim 6, wherein the coating liquid is a coating liquid having a light control function.

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